WO2005051464A1 - Dispositif de traitement endoscopique et aiguille a injection endoscopique - Google Patents

Dispositif de traitement endoscopique et aiguille a injection endoscopique Download PDF

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Publication number
WO2005051464A1
WO2005051464A1 PCT/JP2004/017693 JP2004017693W WO2005051464A1 WO 2005051464 A1 WO2005051464 A1 WO 2005051464A1 JP 2004017693 W JP2004017693 W JP 2004017693W WO 2005051464 A1 WO2005051464 A1 WO 2005051464A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
hollow needle
needle
distal end
endoscope
Prior art date
Application number
PCT/JP2004/017693
Other languages
English (en)
Japanese (ja)
Inventor
Koh Kimura
Kiyotaka Matsuno
Ken Fujisaki
Original Assignee
Olympus Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2003398834A external-priority patent/JP4409263B2/ja
Priority claimed from JP2004043215A external-priority patent/JP4343730B2/ja
Application filed by Olympus Corporation filed Critical Olympus Corporation
Priority to EP04819470A priority Critical patent/EP1695726B1/fr
Priority to DE602004030944T priority patent/DE602004030944D1/de
Publication of WO2005051464A1 publication Critical patent/WO2005051464A1/fr
Priority to US11/440,616 priority patent/US8974417B2/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3478—Endoscopic needles, e.g. for infusion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3494—Trocars; Puncturing needles with safety means for protection against accidental cutting or pricking, e.g. limiting insertion depth, pressure sensors
    • A61B17/3496—Protecting sleeves or inner probes; Retractable tips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0082—Catheter tip comprising a tool
    • A61M25/0084—Catheter tip comprising a tool being one or more injection needles

Definitions

  • the present invention relates to a treatment instrument for an endoscope, that is, an injection needle for an endoscope, which is introduced into a body cavity through a channel of the endoscope and injects a drug solution into a tissue site in the body cavity.
  • an injection needle is inserted into a body cavity through a channel of the endoscope and a medical solution or the like is injected into an affected part in the body cavity.
  • an injection needle for an endoscope having a double tube structure has been proposed.
  • This endoscope injection needle includes, for example, as shown in Patent Document 1 below, an inner tube to which a hollow needle is connected, and an outer tube which holds an inner tube inserted therein so as to be able to advance and retreat. I have.
  • the method of using the injection needle for an endoscope is as follows. First, insert both tubes into the channel and into the body cavity. Next, by pushing the inner tube into the outer tube, the distal needle of the outer tube is pushed out to puncture the living tissue in the body cavity, and the medicinal solution injected into the inner tube is injected.
  • Patent Document 3 discloses an endoscope injection needle for injecting various drug solutions into tissues or blood vessels endoscopically via an inner tube! Puru.
  • insert the endoscope injection needle into the channel of the endoscope protrude the tube end from the endoscope end, then protrude the inner tube to the outer tube, and
  • a needle can be inserted into a tissue or blood vessel, and a syringe can be pressed to inject a drug solution into the tissue or blood vessel.
  • Patent document 1 Japanese Patent Application Laid-Open No. 2001-58006
  • Patent Document 2 U.S. Pat.No. 4791937
  • Patent Document 3 JP 2001-58006 A
  • the air in the inner tube can be eliminated by filling the inner tube with a drug solution before insertion into the endoscope channel. During the subsequent handling and insertion work into the endoscope channel, air may enter the inner tube, and conversely, the drug solution in the inner tube may leak the needle tip force. I get lost.
  • the state (A) shown in FIG. 24 shows a state in which the drug solution Y is injected from the syringe S and the drug solution Y is filled in the drug solution lumen E connected to the needle N. Puru.
  • the reference position of syringe S at this time is indicated by the L line.
  • the liquid Y filled in the liquid lumen E due to the atmospheric pressure is released from the operation unit.
  • air R enters the needle N at the tip of the drug solution lumen E.
  • the conventional injection needle for an endoscope has a restricted outer diameter for passing through a narrow channel of the endoscope, and has a double tube structure. Therefore, the inside diameter of the inner tube through which the drug solution passes is small, and the resistance of the inner wall surface of the tube to the drug solution is large. In the case of a liquid with a high viscosity, this tendency is further strengthened, and it becomes difficult to push out the liquid.
  • the wall thickness of the tube must be reduced.
  • a resin material is used for the tube in consideration of flexibility, and a metal material is used for the hollow needle in consideration of puncture properties and corrosion resistance.
  • the only option is to use bonding technology.
  • the present invention has been made in view of the above circumstances, and provides an endoscope treatment tool which can reduce the economical burden due to liquid leakage and does not stain white coats, floors, and the like.
  • the purpose is to:
  • the operation for pushing out the drug solution, the operation for passing the tube through the channel of the endoscope, and the operation for pushing out the needle with the tip force of the tube can be easily performed, and the injection for the endoscope which can reduce the manufacturing cost inexpensively.
  • the purpose is to provide a needle.
  • the present invention provides an outer tube provided with a liquid supply path therein, a distal end discharge portion which is housed at a distal end of the outer tube and is connected to a distal end of the liquid flow path; Operating means that is provided in the outer tube and that can operate the tip discharge section to protrude and retract from the distal end of the outer tube; and is provided in the outer tube and is communicated with the liquid flow passage.
  • a mirror treatment tool is provided.
  • a liquid is filled in a tube, which is an outer tube, and a hollow needle, which is a force-tip discharge portion, is housed, at the same time, a syringe and a hollow needle which constitute liquid supply means are provided.
  • the liquid flow passage formed between the hollow needle and the distal end opening is blocked, and the operation means side opposite to the hollow needle distal end opening is set as a closed end.
  • an air layer exists at the distal end of the tube as the hollow needle is pulled into the tube, so that even if a drug solution, bodily fluid, blood, etc. remains in the endoscope channel, it is filled in the tube.
  • the chemical solution is separated by the air layer, and the two do not mix.
  • the distal end discharge portion is a hollow needle, and the outer tube that houses the hollow needle is insertable into a channel of the endoscope.
  • the blocking means blocks the flow of the liquid in the liquid flow passage only in a state where the operating means is operated to house the hollow needle in the outer tube. It is desirable.
  • the operating means includes a wire connected to the hollow needle, and the blocking means is a sealing member made of a fuzzy material provided at an intermediate portion of the wire.
  • the sealing member is provided with an orifice that opens and closes the liquid flow passage when the wire moves with respect to the hollow needle.
  • the present invention provides an outer tube; a hollow needle housed in the outer tube and having a side hole; A wire connected to the outer tube and driving the hollow needle from the distal end of the outer tube; and a base member attached to the proximal end of the outer tube and capable of supplying a liquid from the distal end of the hollow needle to the inside of the outer tube and through the hollow needle side hole.
  • a tip watertight means provided on the tip side of the side hole of the hollow needle to keep the outer peripheral surface of the hollow needle and the inner wall of the mantle tube watertight; and a hand watertight means to keep the inner wall of the base member and the wire watertight.
  • a treatment member for an endoscope wherein a sealing member is provided at an intermediate portion of the wire; and the sealing member is detached along with driving of the distal end force of the mantle tube of the hollow needle into and out, and the base member and An orifice for opening and closing a liquid flow between the hollow needle and the hollow needle;
  • a liquid is filled in a tube, which is a mantle tube, and a hollow needle, which is a force tip discharge part, is housed, at the same time, a syringe and a hollow which constitute liquid supply means are provided.
  • the liquid flow passage formed between the needle tip opening is shut off, and the operation means side opposite to the hollow needle tip opening is made a closed end.
  • an air layer is present at the distal end of the tube in accordance with the operation of pulling the hollow needle into the tube. Therefore, even if a drug solution, body fluid, blood, or the like remains in the endoscope channel, the tube remains in the tube. The filled chemical is separated by the air layer, and the two do not mix.
  • the present invention provides an outer tube having a liquid passage formed therein; a hollow needle which is housed so as to be able to protrude and retract from a tip of the outer tube and discharges the liquid supplied through the liquid passage; Operating means operated at the proximal end of the outer tube and operating means for projecting and retracting the hollow needle from the distal end of the outer tube; a needle for an endoscope, wherein the distal end of the outer tube has a reduced diameter portion. Formed The hollow needle is provided with a large-diameter portion for closing the distal end of the outer tube by contacting the reduced-diameter portion when the hollow needle projects from the distal end of the outer tube. Provide an injection needle.
  • the outer tube is passed through the channel of the endoscope, and the distal end force of the outer tube is protruded using the operating means on the proximal end side of the outer tube to cause the hollow needle to protrude to the affected part.
  • the drug solution is injected into the mantle tube through the liquid passage of the mantle tube and the distal force of the hollow needle is discharged, the medicinal solution is injected into the affected part.
  • the reduced diameter portion formed at the tip of the mantle tube is closed by the large diameter portion when the hollow needle is protruded, so that even if the injection pressure is applied to the medicinal solution, the medicinal solution may leak out of the mantle tube. Absent.
  • the injection needle for an endoscope of the present invention has a single tube structure rather than a conventional double tube structure, and does not require an outer tube. It is possible to make the inside diameter of the tube larger than before. Accordingly, the resistance of the inner surface of the mantle tube to the chemical solution is reduced, and the operation becomes easy even when a highly viscous chemical solution is extruded. In addition, a sufficient size of the inner diameter can be secured without forcibly increasing the outer diameter of the tube, so that the operation of passing the tube through the channel becomes easier. Further, a sufficient inner and outer diameter can be secured without forcibly reducing the wall thickness of the tube, so that the tube does not buckle.
  • the hollow needle is provided with a sealing member that comes into contact with and adheres to the reduced diameter portion.
  • the sealing member comes into close contact with the reduced diameter portion, high watertightness is obtained so that the liquid medicine does not leak out of the outer tube through the peripheral force reduced diameter portion of the hollow needle.
  • the sealing member is provided at a front end of the large diameter portion. Further, it is desirable that the sealing member comes into contact with the reduced diameter portion and elastically deforms, thereby closely contacting the reduced diameter portion. Further, it is preferable that the sealing member abuts on the reduced diameter portion by projecting the distal end force of the outer tube from the hollow needle, and is elastically deformed.
  • the sealing member be provided on a side surface of the large diameter portion or a rear end of the large diameter portion.
  • the sealing member is slidably in contact with the inner surface of the outer tube and has a watertight property for preventing leakage of the chemical solution between the inner member and the inner surface of the outer tube.
  • the sealing member adheres to the inner surface of the outer tube by elastic deformation.
  • the sealing member is disposed inside the outer tube by being pushed into the outer tube, and is elastically deformed.
  • the sealing member is in contact with the inner surface of the outer tube, high watertightness can be obtained so that the liquid medicine does not leak out of the outer tube even when the hollow needle does not protrude from the distal end of the outer tube.
  • the injection needle for an endoscope of the present invention it is preferable that at least one of the large-diameter portion and the reduced-diameter portion becomes an elastic body force, and one of the large-diameter portion and the reduced-diameter portion is brought into close contact by being elastically deformed.
  • the contact area between the large-diameter portion and the reduced-diameter portion increases, and higher watertightness can be obtained.
  • the diameter of the outer peripheral surface of the large-diameter portion gradually increases as the distal force of the mantle tube also moves toward the base end, and the inner peripheral surface of the reduced-diameter portion. It is desirable that the diameter of the surface gradually expands toward the distal end and the proximal end of the outer tube, so that the inner peripheral surface of the reduced diameter portion and the outer peripheral surface of the large diameter portion come into contact with each other.
  • the outer peripheral surface of the large-diameter portion and the inner peripheral surface of the reduced-diameter portion come into surface contact in a wider range, so that higher watertightness can be obtained. Also, there is no need to provide a sealing member, so the number of components can be reduced.
  • the length of the reduced diameter portion along the moving direction of the hollow needle is longer than the moving distance when the hollow needle protrudes and retracts from the distal end of the mantle tube. It is preferable that the tip of the hollow needle is disposed inside the reduced diameter portion even when the hollow needle is long and the hollow needle is submerged from the tip of the mantle tube.
  • the operating means includes a wire having one end connected to the hollow needle and the other end operated on the proximal end side of the outer tube.
  • the operating means causes the other end of the wire inserted in the mantle tube to advance and retreat inside the mantle tube, thereby causing the hollow needle to protrude and retract from the distal end of the mantle tube. Since the hollow needle is advanced and retracted using a wire, the tube does not need to be doubled as in the conventional case.
  • the outer diameter of the outer tube is the same as the conventional outer tube, and the inner diameter of the liquid passage is the same. Can be increased.
  • the inner diameter of the liquid flow passage may be the same as that of the conventional inner tube, and the outer diameter of the outer tube may be reduced. Further, it is possible to increase the wall thickness of the mantle tube without increasing the outer diameter of the mantle tube or reducing the inner diameter of the liquid flow passage.
  • the hollow needle bends the wire so that the central axis of the hollow needle obliquely intersects the central axis of the reduced diameter portion. Desired to be placed in the.
  • the tip of the hollow needle will be directed toward the center of the reduced diameter portion. It is possible to accurately perform the correct operation without piercing the device.
  • the present invention provides a hollow needle which is housed so as to be able to protrude and retract from the distal end of the mantle tube and discharges the liquid supplied through the liquid flow passage;
  • An endoscope injection needle made of a flexible material is provided.
  • the outer tube is passed through the channel of the endoscope, and the hollow needle is projected from the lid portion at the distal end of the outer tube using the operating means on the proximal end side of the outer tube. Then, the hollow needle protruding from the lid is pierced into the affected part, the medicinal solution is injected into the liquid flow passage of the mantle tube, and the distal end of the hollow needle is discharged, whereby the medicinal solution is injected into the affected part.
  • the distal end of the mantle tube is closed by the lid, and the hollow needle penetrates the lid made of a soft material and projects the tip force of the mantle tube, so that the drug solution does not leak out of the mantle tube.
  • the present invention provides an outer tube having a liquid passage formed therein; A hollow needle that is freely stored and discharges the liquid supplied through the liquid flow passage; and an operating unit that is operated at the base end of the outer tube and projects and retracts the hollow needle from the distal end of the outer tube.
  • An endoscope injection needle comprising: an operating means comprising a wire inserted through the outer tube, wherein the wire has one end connected to the hollow needle and the other end connected to the base of the outer tube. Operated on the end side, the hollow needle is set to a length that holds the hollow needle in a state where the hollow needle is protruded from the distal end of the mantle tube and holds the hollow needle in a fixed position.
  • An injection needle for an endoscope in which the other end is advanced and retracted inside the mantle tube, whereby the hollow needle is pushed into and out of the distal end force of the mantle tube.
  • the mantle tube which does not require the provision of the reduced-diameter portion and the lid at the end of the mantle tube, has a simple structure with an open end, thereby improving workability.
  • the hollow needle and the wire are both made of a metal material, and one end of the wire is welded to the base end of the hollow needle.
  • the hollow needle and the wire are both made of a metal material and both are fixed by welding, the joining cost is lower than in the past.
  • a hole penetrating a tube wall is formed at a base end side of the hollow needle.
  • medical solution is inject
  • the center of the hollow needle and the wire can be connected, it is possible to reduce the diameter of the hollow needle including the large diameter portion as compared with the case where the wire is connected to the outer surface of the hollow needle. Thus, the outer diameter of the mantle tube can be reduced.
  • the intrusion of air due to the force of the needle of the tube and the leakage of liquid from the mantle tube are prevented, and the work of removing the invaded air becomes unnecessary. , Increasing ease of use. Further, since the liquid is not wasted due to the liquid leakage, the economical burden can be reduced. Moreover, the leaked chemical does not stain the white coat and floor. ADVANTAGE OF THE INVENTION According to the injection needle for endoscopes of this invention, the operation which pushes out a chemical
  • FIG. 1 is a side view showing an endoscope injection needle according to a first embodiment of the present invention, showing a state where a slide portion is pulled out.
  • FIG. 2 is a side view showing the injection needle for an endoscope according to the first embodiment of the present invention, showing a state where a slide portion is pushed into a main body.
  • FIG. 3 is a cross-sectional view along an axial direction showing an injection needle for an endoscope according to a first embodiment of the present invention.
  • FIG. 4 is a cross-sectional view along an axial direction showing a main part of an endoscope injection needle according to the first embodiment of the present invention.
  • FIG. 5 is a cross-sectional view of a conventional endoscope injection needle taken in a direction perpendicular to the axial direction.
  • FIG. 6 is a cross-sectional view of the injection needle for an endoscope according to the first embodiment of the present invention, which is vertically perpendicular to the axial direction.
  • FIG. 7 is a cross-sectional view along an axial direction showing a main part of an injection needle for an endoscope according to a second embodiment of the present invention.
  • FIG. 8 is a cross-sectional view along an axial direction showing a main part of an endoscope injection needle according to a third embodiment of the present invention.
  • FIG. 9 is a cross-sectional view along an axial direction showing a main part of an endoscope injection needle according to a fourth embodiment of the present invention.
  • FIG. 10 is a sectional view along an axial direction showing a main part of an injection needle for an endoscope according to a fifth embodiment of the present invention.
  • FIG. 11 is a cross-sectional view along an axial direction showing a main part of an injection needle for an endoscope according to a fifth embodiment of the present invention.
  • FIG. 12 is an axial sectional view showing a main part of an endoscope injection needle according to a sixth embodiment of the present invention, in which a reduced diameter portion and a large diameter portion are separated. The state is shown.
  • FIG. 13 is a sectional view along an axial direction showing a main part of an injection needle for an endoscope according to a sixth embodiment of the present invention, in which a large diameter portion is in close contact with a reduced diameter portion. Is shown.
  • FIG. 14 is a sectional view along an axial direction showing a main part of an endoscope injection needle according to a seventh embodiment of the present invention.
  • FIG. 15 is a cross-sectional view along an axial direction showing a main part of an injection needle for an endoscope according to an eighth embodiment of the present invention.
  • FIG. 16 is a sectional view along an axial direction showing an injection needle for an endoscope according to a ninth embodiment of the present invention.
  • FIG. 17 is a cross-sectional view along an axial direction showing a main part of an injection needle for an endoscope according to a tenth embodiment of the present invention.
  • FIG. 18 is a sectional view along an axial direction showing a main part of an injection needle for an endoscope according to an eleventh embodiment of the present invention.
  • FIG. 19 is a cross-sectional view along an axial direction showing a main part of an endoscope injection needle according to a twelfth embodiment of the present invention.
  • FIG. 20 is a cross-sectional view along an axial direction showing a main part of an injection needle for an endoscope according to another embodiment of the present invention.
  • FIG. 21 is an overall cross-sectional view of an embodiment of the present invention in which a hollow needle is housed in a tube and a part of an endoscope injection needle is omitted.
  • FIG. 22 is an overall cross-sectional view of the same embodiment, with a part of the injection needle for an endoscope omitted, in a state where the hollow needle protrudes from the tube.
  • FIG. 23 is a cross-sectional view of the distal end of the injection needle for an endoscope in the same embodiment, with an air layer K provided at the distal end of the tube.
  • FIG. 24 is a view for explaining a state of a distal end of a drug solution lumen with respect to a position of a syringe in a conventional injection needle for an endoscope.
  • FIGS. 1 to 6 A first embodiment of the endoscope injection needle of the present invention will be described with reference to FIGS. 1 to 6.
  • the injection needle 1 for an endoscope includes an outer tube 3, a hollow needle 5, and an operation unit (operation means) 7, as shown in FIGS.
  • the mantle tube 3 is formed of a resin material such as fluorine, polyamide, or polyethylene, and has a cylindrical shape with a circular cross section. Inside the mantle tube 3, a liquid flow passage 3a is formed.
  • the hollow needle 5 is housed inside the mantle tube 3 so as to be able to protrude and retract from the tip of the mantle tube 3, and discharges the liquid supplied through the liquid flow passage 3a from the needle tip.
  • the operating unit 7 is operated at the base end of the mantle tube 3, and causes the hollow needle 5 to protrude and retract from the distal end of the mantle tube 3.
  • a diameter-reduced portion 2 is formed at the tip of the mantle tube 3 so as to form a partition wall at the end face.
  • a circular small hole is formed in the center of the reduced diameter portion 2, and the hollow needle 5 projects the small hole force needle tip.
  • the hollow needle 5 is provided with a large-diameter portion 5A which is thickened in the radial direction with the needle body being substantially at the center.
  • the large diameter portion 5A is provided integrally with or separately from the hollow needle 5, and a slight gap is provided between the outer peripheral surface of the large diameter portion 5A and the inner surface of the outer tube 3.
  • the hollow needle 5 is provided at the front end of the large diameter portion 5A.
  • An O-ring (sealing member) 8 is provided which comes into contact with and comes into close contact with the reduced-diameter portion 2 when is moved forward.
  • the O-ring 8 is a resin material capable of elastic deformation.
  • the outer diameter of the O-ring 8 is set to be smaller than the inner diameter of the outer tube 3 and not to contact the inner surface of the outer tube 3.
  • the inner diameter of the O-ring 8 is smaller than the outer diameter of the hollow needle 5.
  • the O-ring 8 pushes the hollow needle 5 inward so that the O-ring 8 does not easily come off from the hollow needle 5, and the O-ring 8 It adheres by its own elastic force.
  • the O-ring 8 is elastically deformed when pressed against the reduced diameter portion 2 and comes into close contact with the inner surface of the reduced diameter portion 2. In this state, the O-ring 8 exhibits high watertightness so that the chemical solution does not leak from the reduced diameter portion 2 except for the needle hole of the hollow needle 5.
  • the inner peripheral surface of the O-ring 8 is formed flat, or the inner peripheral surface of the O-ring 8 and the outer peripheral surface of the hollow needle 5 are formed with fine irregularities. It is more preferable to increase the frictional resistance between each other.
  • the O-ring 8 may have an oval, elliptical, or quadrangular shape whose radial cross section is not limited to a circular shape as shown in the figure.
  • the operation unit 7 includes a wire 6 inserted through the mantle tube 3, an operation unit main body 10 that operates the wire 6 on the base end side of the mantle tube 3, and a slide unit 11.
  • the wire 6 has one end connected to the rear end of the hollow needle 5 and the other end connected to the slide portion 11.
  • the wire 6 is, for example, a single wire made of stainless steel having an outer diameter of 0.3 to 0.5 mm, and is brazed or welded to the outer peripheral surface of the metal hollow needle 5 at the base end side. Are connected by the method described above.
  • the operating section 7 pushes the slide section 11 into the operating section main body 10 or pulls out the bow I to advance and retreat the wire 6 inside the mantle tube 3 so that the tip of the hollow needle 5 protrudes from the tip of the mantle tube 3. Submerge.
  • the operation section main body 10 is formed with a through hole 10 a communicating with the liquid flow passage 3 a inside the mantle tube 3.
  • the slide part 11 is provided with a piston part ib slidably in contact with the through hole 10a.
  • the slide portion 11 is formed with a through hole 11a communicating with the liquid flow passage 3a inside the mantle tube 3 via the through hole 10a.
  • the through hole 11a opens at the base end of the slide portion 11, and a base 12 is provided at the opening. From this base 12, it is possible to inject a drug solution into the inside of the mantle tube 3 through the through holes 11a, 10a.
  • the slide portion 11 is provided with an annular member 10c that fits into the through hole 10a when the slide portion 11 is pushed into the operation portion main body 10, and fixes the slide portion 11 to the operation portion main body 10.
  • the distal end of the hollow needle 5 is inserted into the channel of the endoscope with the distal end thereof housed in the outer tube 3, and the distal end of the outer tube 3 is projected from the distal end of the endoscope.
  • the liquid flow passage 3a of the mantle tube 3 is filled with a chemical in advance.
  • the slide portion 11 After projecting the distal end of the mantle tube 3, the slide portion 11 is pushed into the operation section main body 10 to advance the wire 6 inside the mantle tube 3.
  • the hollow needle 5 connected to the end of the wire 6 also advances inside the mantle tube 3.
  • the sliding portion 11 is further pushed into the operation portion main body 10 to advance the wire 6 inside the mantle tube 3. Even if the O-ring 8 abuts on the reduced diameter portion 2, the sliding portion 11 is still pushed in.
  • the hollow needle 5 protrudes from the distal end of the mantle tube 3, and the O-ring 8 is pressed against the reduced diameter portion 2 to be elastically deformed and adhere to the inner surface of the reduced diameter portion 2. .
  • the O-ring 8 When the O-ring 8 is in close contact with the inner surface of the reduced-diameter portion 2, the O-ring 8 exhibits high watertightness so that the chemical solution does not leak from the reduced-diameter portion 2 except for the needle hole of the hollow needle 5.
  • the slide portion 11 When the slide portion 11 is pushed in until the O-ring 8 comes into close contact with the reduced diameter portion 2, the annular member 10c fits into the through hole 10a, and the slide portion 11 is fixed to the operation portion main body 10.
  • the hollow needle 5 By fixing the slide portion 11 to the operation portion main body 10, the hollow needle 5 is fixed with the distal end force of the mantle tube 3 protruding.
  • the mantle tube 3 passed through the channel is operated so as to protrude from the end force of the endoscope, and the needle tip of the hollow needle 5 is punctured into the living tissue. .
  • a pressurizing device such as a syringe is attached to the base 12, and the liquid medicine filled in the liquid flow passage 3 a is pressurized, the liquid medicine is injected into the living tissue from the hollow needle 5.
  • the reduced diameter portion 2 is closed by the O-ring 8 when the distal end force of the hollow needle 5 is protruded from the outer tube 3, so that the inside of the outer tube 3 is closed. Even if the injection pressure is applied to the chemical, the chemical does not leak out of the outer tube 3 from the reduced diameter portion 2.
  • the conventional double-tube structure has a single-tube structure, and it is not necessary to consider the outer tube.
  • the inside diameter can be larger than the inside diameter of a conventional inner tube.
  • the inner and outer diameters of the outer tube are 1.7 mm and 2.4 mm, respectively, and the inner and outer diameters of the inner tube are 0.85 mm and 1.5, respectively. If it is 5 mm, as shown in Fig. 5, it is not possible to flow a chemical solution into the cross section X of the pipe of the inner tube.
  • the inner diameter and the outer diameter of the outer tube 3 of the injection needle 1 for an endoscope are the same as those of the outer tube, as shown in FIG.
  • the cross-sectional area of the liquid flow path can be calculated to be approximately 385%.
  • the pipe resistance of the liquid flow passage 3a of the outer tube 3 as long as 1.5-2.5m can be greatly reduced, and even when a highly viscous chemical solution is extruded, the slide portion 11 is lightly operated. be able to.
  • the cross-sectional area of the liquid flow passage 3a is made the same size as the inner tube of the conventional double-tube type injection needle, and the outer tube 3 It is also possible to reduce the diameter.
  • the cross-sectional area of the liquid flow passage 3a is set to be the same size as the inner tube of the conventional double-tube type injection needle, and even if the thickness of the outer tube 3 is increased, the outer diameter of the outer tube 3 is reduced.
  • the outer diameter of the outer tube of the conventional double tube type injection needle smaller, when inserting the endoscope into the channel or piercing the hollow needle 5 into the tissue, Buckling of the mantle tube 3 can be prevented.
  • the hollow needle 5 and the wire 6 are joined by a very common and inexpensive technique such as brazing or welding. Manufacturing cost is low.
  • the wire 6 is connected to the outer peripheral surface on the proximal end side of the hollow needle 5 and the pipe line of the hollow needle 5 is held in a straight line, even if it is highly viscous and a chemical solution, it is strong. Liquid can be easily sent without filling.
  • the metal hollow needle 5 having a hard material force can be provided among the components arranged on the distal end side of the mantle tube 3. If the length of the hollow needle 5 is made as short as possible, Even when the distal end of the endoscope must be curved up to 240 degrees, such as when used for the digestive tract, etc., the insertion of the mantle tube 3 into the endoscope or the hollow needle 5 Can be pushed out with a light force.
  • the outer diameter of the O-ring 8 is made smaller than the inner diameter of the mantle tube 3, and the inner surface of the mantle tube 3 is not contacted! Therefore, the sliding resistance when the hollow needle 5 advances and retreats inside the mantle tube 3 is extremely small, and the operability of the slide portion 11 is excellent.
  • the O-ring it is required that the outer diameter of the O-ring 8 and the inner diameter of the outer tube 3 be strictly controlled so that the liquid medicine does not leak from the gap between the inner tube 8 and the inner surface of the outer tube 3. This is because if a chemical leaks from a gap between the O-ring 8 and the inner surface of the mantle tube 3, the chemical is wasted.
  • the O-ring 8 is disposed on the proximal end side of the large-diameter portion 5A so that it does not easily come off the hollow needle 5 as in the first embodiment. Then, the hollow needle 5 is pushed inward, and is in close contact with the outer peripheral surface of the hollow needle 5 by its own elastic force.
  • the endoscope injection needle 13 is used in the same manner as the endoscope injection needle 1 of the first embodiment, and has the same function and effect. Furthermore, when the chemical solution flows into the inside of the hollow needle 5, a turbulent flow region generated on the base end side of the large diameter portion 5A can be suppressed to be small. Further, it is possible to prevent air from flowing into the gap between the large diameter portion 5A and the mantle tube 3.
  • the O-ring 8 is disposed on the side surface of the large diameter portion 5A.
  • a groove 16 into which the O-ring 8 is fitted is provided on the side surface of the large diameter portion 5A in order to prevent the O-ring 8 from falling off.
  • the O-ring 8 pushes the large-diameter portion 5A inward and fits into the groove 16 so that the O-ring 8 does not easily come off from the large-diameter portion 5A. .
  • the endoscope injection needle 13 is used in the same manner as the endoscope injection needle 1 of the first embodiment, and has the same operation and effect. Furthermore, since the O-ring is not attached to the hollow needle 5, the length of the hollow needle 5 can be shortened, so that the distal end of the mantle tube 3 can be mounted even with the hollow needle 5 inside. Flexibility increases. When the flexibility of the distal end of the mantle tube 3 is increased, when inserting the mantle tube 3 into the channel of the endoscope, the operation of passing the mantle tube 3 through the channel becomes easy even if the insertion portion is bent. Also, when performing the operation of bending the distal end of the insertion portion, the hollow needle 5 is less likely to be caught by the channel. Operation becomes easier.
  • the hollow needle 5 is not provided with an O-ring, and the large-diameter portion 18 is made of an elastically deformable material.
  • the large-diameter portion 18 is elastically deformed when pressed against the reduced-diameter portion 2, and comes into close contact with the inner surface of the reduced-diameter portion 2.
  • the endoscope injection needle 17 is used in the same manner as the endoscope injection needle 1 of the first embodiment, and has the same function and effect. Further, since the large-diameter portion 18 also functions as a sealing member, the length of the hollow needle 5 can be shortened, whereby the outer tube can be made even when the hollow needle 5 is provided inside. The flexibility of the tip of 3 is increased. When the flexibility of the distal end of the outer tube 3 is increased, as described in the description of the third embodiment, the operation of passing the outer tube 3 through the channel or projecting the hollow needle 3 at the distal end force of the outer tube 3 Is easier to do.
  • the large-diameter portion 18 also functions as a sealing member, the number of components can be reduced, and the manufacturing cost can be reduced.
  • the hollow needle 5 is not provided with a sealing member such as an O-ring, and as shown in FIG. It is provided.
  • the sealing member 21A also has a material force capable of elastic deformation, and is formed in a thick cylindrical shape. When the large-diameter portion 5A is pressed, the sealing member 21A elastically deforms and comes into close contact with the front end face of the large-diameter portion 5A.
  • the sealing member 21A is elastically deformed and closely adheres to the large diameter portion 5A as shown in FIG. Therefore, the same operation and effect as those of the fourth embodiment can be obtained. Further, since the sealing member 21A is fixed at a fixed position and does not move with respect to the mantle tube 3, it is not necessary to consider the falling off of the sealing member due to the hollow needle force.
  • the endoscope injection needle 22 of the present embodiment is not provided with a reduced diameter portion, and has a lid portion 24 for closing the distal end of the mantle tube 23 as shown in FIGS.
  • the lid 24 is made of a soft material such as a synthetic resin so that the needle tip of the hollow needle 5 can be penetrated.
  • the mantle tube 23 is passed through the channel of the endoscope, the operating unit 7 is operated, and the hollow needle 5 is pierced into the inner surface of the lid unit 24.
  • the tip of the hollow needle 5 is projected from the outer surface of 24.
  • the hollow needle 5 protruding from the lid portion 24 is punctured into the living tissue, a drug solution is injected into the liquid flow passage of the mantle tube 23, and when the distal end of the hollow needle 5 is discharged, the drug solution is injected into the affected part.
  • the distal end of the mantle tube 23 is closed by the cover portion 24, and the hollow needle 5 penetrates the cover portion 24, which also has a soft material force, so that the tip force of the mantle tube 23 also protrudes, so that the drug solution leaks out of the mantle tube 23. That is.
  • the inside of the outer tube 23 is kept in a sealed state until the hollow needle 5 is projected from the lid portion 24, so that the sterilized state is maintained. Can be.
  • the lid 24 is relatively easy to process, the manufacturing cost can be reduced.
  • the outer diameter force of the outer peripheral surface of the large-diameter portion 26 also gradually increases the distal force of the outer tube 23 toward the proximal end.
  • the inner diameter of the inner peripheral surface of the reduced diameter portion 27 gradually increases as the distal force of the outer tube 23 also moves toward the proximal end.
  • the inclination of the outer peripheral surface of the large-diameter portion 26 and the inclination of the inner peripheral surface of the reduced-diameter portion 27 substantially match, and when the large-diameter portion 26 is pressed against the reduced-diameter portion 27, the outer periphery of the large-diameter portion 26 Face and reduced diameter part 2 7 comes into contact with the inner peripheral surface.
  • the endoscope injection needle 25 is used in the same manner as the endoscope injection needle 1 of the first embodiment, and has the same operation and effect. Furthermore, since the outer peripheral surface of the tapered large diameter portion 26 and the inner peripheral surface of the similarly tapered reduced diameter portion 27 are in surface contact, when an injection pressure is applied to the chemical solution, In addition, leakage of the chemical solution between the large diameter portion 26 and the reduced diameter portion 27 is prevented.
  • the injection needle 25 for an endoscope since a sealing member such as the O-ring 8 is not required, it is not necessary to consider a drop-off thereof. Further, the manufacturing cost can be reduced.
  • the length of the reduced diameter portion 30 along the moving direction of the hollow needle 5 is determined when the hollow needle 5 protrudes and retracts at the tip force of the outer tube 31. It is formed longer than the moving distance of the hollow needle 5.
  • the reduced diameter portion 30 is also configured with a soft material force that is easy to bend. Even when the hollow needle 5 is sunk from the distal end of the mantle tube 31, the tip of the hollow needle 5 is not completely extracted from the reduced diameter portion 30, but is arranged inside the reduced diameter portion 30.
  • the endoscope injection needle 28 is used in the same manner as the endoscope injection needle 1 of the first embodiment, and has the same function and effect. Furthermore, even when the hollow needle 5 is sunk from the distal end of the mantle tube 31, the tip of the hollow needle 5 is disposed inside the reduced diameter portion 30, so that the tip of the hollow needle 5 pierces the reduced diameter portion 30. For example, it is possible to avoid a situation in which it is impossible to protrude from the mantle tube 31. In addition, since the tip of the hollow needle 5 is disposed inside the reduced diameter portion 30, even if the O-ring 8 is likely to lose the tip force, the reduced diameter portion 30 locks the O-ring 8. The o-ring 8 can be prevented from falling off. Furthermore, since the locking portion 30 is made of a soft material and the flexibility of the distal end of the outer tube 31 is maintained, it is not difficult to insert the outer tube 31 into the channel.
  • the reduced diameter portion is not provided, and the distal end of the outer tube 35 is open.
  • the wire 33 is set to have such a length that when the wire 33 is advanced inside the mantle tube 35 to protrude the hollow needle 5 at the distal end of the mantle tube 35, the hollow needle 5 is retained at that position.
  • the O-ring 8 is disposed at the rear end of the large diameter portion 5A and is fixed to the hollow needle 5.
  • the endoscope injection needle 32 it is not necessary to provide a reduced diameter portion and a lid at the distal end of the outer tube 35, and the structure of the distal end of the outer tube 35 is simplified. Workability of 35 increases. In addition, since the amount of insertion of the hollow needle 5 into the living tissue is defined at the maximum by the length of the needle tip of the hollow needle 5 protruding from the large diameter portion 5A, the accuracy of the treatment is improved.
  • the O-ring 8 is in contact with the inner surface of the outer tube 3 without any gap. Since the O-ring 8 is in contact with the inner surface of the mantle tube 3 without any gap, even if the hollow needle 5 is retracted, that is, even if the O-ring 8 is not in contact with the reduced diameter portion 2, the O-ring 8 The chemical does not leak from between the inner surface of the outer tube 3 and the inner tube 8.
  • the wire 40 1S connected to the hollow needle 5 is slightly bent and plastically deformed, so that the hollow needle 5 is compressed and the central axis C 1 of the hollow needle 5 is reduced. It is arranged so as to obliquely intersect the center axis C2 of the diameter portion 2.
  • the bending angle of the wire 40 is such that the wire 40 overlaps the central axis C2 of the needle tip reduced diameter portion 2 of the hollow needle 5 when the wire 40 extends along the inner surface of the mantle tube 3.
  • the endoscope injection needle 28 is used in the same manner as the endoscope injection needle 1 of the first embodiment, and has the same function and effect. Furthermore, if the wire 40 is arranged along the mantle tube 3, the needle tip of the hollow needle 5 overlaps with the central axis C2 of the reduced diameter portion 2, so that it is not necessary to perform an elaborate operation at the time of assembly. Further, when the hollow needle 5 is made to protrude also at the tip end of the mantle tube 3, the hollow needle 5 Since the needle tip does not stick into the inner surface of the reduced diameter portion 2, correct operation can be performed accurately. Further, since the wire 40 is made of metal and is plastically deformed only by bending, the processing of the wire 40 is very simple and the production cost is low.
  • a hollow needle 42 closer to the proximal end than the large diameter portion, and a hole 43 penetrating the tube wall are formed.
  • the wire 40 has the proximal force of the hollow needle 42 inserted into the tube, and is connected to the hollow needle 42 by caulking or the like.
  • the hole 43 is formed so as to be larger than the cross-sectional area inside the hollow needle 42 with the opening area force. Therefore, the cross-sectional area inside the hollow needle 42 is the smallest among the routes through which the chemical solution is transported.
  • the endoscope injection needle 28 is used in the same manner as the endoscope injection needle 1 of the first embodiment, and has the same function and effect. Further, since the hollow needle 42 and the wire 6 are connected with their central axes aligned, the diameter of the hollow needle can be made smaller than when the wire is connected to the outer peripheral surface of the hollow needle. Therefore, the outer diameter of the mantle tube 3 can be made smaller, the mantle tube 3 can be easily inserted into the channel, and the hollow needle 5 can be easily punctured into the living tissue. Also, by reducing the inner diameter while keeping the outer diameter of the outer tube 3, the thickness of the outer tube 3 can be further increased, and the outer tube 3 can be hardly buckled.
  • the force of providing a sealing member on the hollow needle to prevent leakage of the chemical solution As shown in FIG. 20, the large diameter portion 5A and the locking portion 2 are directly connected to each other. It is not necessary to provide a sealing member as long as they adhere to each other and a sufficient watertightness is secured between them.
  • FIGS. 21 and 22 are cross-sectional views in which a part of the endoscope injection needle according to one embodiment of the present invention is omitted, and FIG. 23 is a cross-sectional view of the tip of the endoscope injection needle according to the embodiment.
  • FIG. 21 is a view showing a state in which the hollow needle 106 serving as the distal end discharge portion is housed in the tube 104 serving as the outer tube
  • FIG. 22 is a state in which the distal end of the hollow needle 106 projects from the tube 104
  • FIG. 23 is a view showing a state in which an air layer K is formed at the tip of the tube.
  • the injection needle for an endoscope as an endoscope treatment tool includes a distal needle portion 101, an insertion portion 102, and an operation portion 103 that constitutes an operation means.
  • the insertion portion 102 includes a tube 104 made of a synthetic resin material having elasticity such as a fluorine resin, polyethylene, or polyamide, and a stainless steel provided in the tube 104 and movable relatively to the tube 104. It has a wire 105 (single wire or stranded wire) that also has strength such as steel.
  • the distal needle portion 101 is joined at the distal end of the tube 104 to a hollow needle 106 which is joined to the distal end of a wire 105 by welding or force crimping, and to the outer peripheral surface of the hollow needle 106 by welding or caulking.
  • a first watertight member 109 which is a watertight tip watertight means which is press-fitted into the outer peripheral surface of the hollow needle 106 on the distal end side of the 107 and is slidable on the inner wall of the tube 104 is provided.
  • an opening 104a narrowed by thermoforming or the like is provided so that the hollow needle 106 can pass therethrough and has a diameter that prevents the passage of the large diameter member 107. Is received.
  • a wire 105 is inserted into the proximal end of the hollow needle 106 to close the proximal end of the hollow needle 106. Since the side hole 108 is provided on the peripheral surface of the hollow needle 106, the side hole 108 and the distal end of the hollow needle are opened. With 110, liquid can flow.
  • the outer peripheral surface of the first watertight member 109 is always in contact with the inner wall of the tube 104 to ensure watertightness between the outer peripheral surface of the hollow needle 106 and the inner wall of the tube 104.
  • the operation unit 103 includes a base member 111 attached to the base end of the tube 104 in a watertight state, and a base end of the wire 10 that passes through the inner lumen of the base member 111 and also protrudes the base end force of the base member 111.
  • Slider 112 which is an operation means fixed to the base member, a sealing member 113 which is attached to the peripheral surface of the wire 105 in the base member 111 to constitute a blocking means, and is interposed between the base member 111 and the slider 112.
  • a spring member 114 that elastically urges the slider 112 in a direction away from the base member 111, and a hand that is disposed on the inner surface of the base end of the base member 111 and makes a watertight state between the wire 105 and the base surface of the base member 111.
  • a second watertight member 115 as a watertight means.
  • the base member 111 is a hollow part, and its tip is attached to the tube 104.
  • the liquid can freely flow through the Ube 104.
  • the internal lumen of the base member 111 is branched near the center, and a base part 116 is provided at the end of the branched lumen.
  • a syringe 120 constituting liquid supply means is attached to the base 116.
  • a receiving portion 117 having an orifice 117b having a clearance with respect to the wire 105 and having a dimension set so that the sealing member 113 cannot pass therethrough is provided on the distal end side of the branch portion of the inner lumen of the base member 111. Is provided on the body.
  • the blocking member is constituted by the sealing member 113 and the orifice 117, and the relative relationship between the sealing member 113 and the orifice 117b is as described below.
  • the slider 112 is piled up by the elastic force of the spring member 114 and pushed out to the distal end side, and as shown in FIG. 22, the distal end of the hollow needle 106 protrudes from the distal end opening 104 a of the tube 104. Then, the sealing member 113 is separated from the receiving portion 117, and the orifice 117b is opened. Therefore, liquid can flow freely from the syringe 120 to the inner lumen of the base member 111, the orifice 117b of the receiving portion 117, and the inside of the tube 104 and the hollow needle tip opening portion 110 through the side hole 108 of the hollow needle 106. Is formed.
  • the sealing member 113 completely closes the orifice 117b of the receiving portion 117 together with the wire 105, and the inside of the base member 111 is separated from both sides by the receiving portion 117 as a boundary.
  • the liquid flow path Q formed between the syringe 120 and the hollow needle tip opening 10 is blocked, and the flow of the liquid is regulated.
  • the sealing member 113 is preferably made of an elastic material so that it can be securely crushed and deformed to completely close the orifice 117b and reliably block liquid.
  • the base end of the mouthpiece member 13 has an external thread 118 so that the mouthpiece member 111 and the slider 112 are screwed together in a pushed state.
  • a female screw 119 is provided on the slider 112 side.
  • the slider 112 is pushed toward the base member 111 against the elastic force of the spring member 114, and the slider 112 is rotated in the pushed state. Then, the slider 112 is screwed into the base member 111. As a result, the positions of the slider 112 and the base member 111 are relatively fixed, and the state in which the hollow needle 106 protrudes from the distal end of the tube 104 is maintained.
  • the sealing member 113 is separated from the receiving portion 117 so that the orifice 117b is opened, and the liquid flow path Q is secured between the syringe 120 and the distal end opening 110 of the hollow needle 106 so that the liquid can flow.
  • the syringe 120 filled with the liquid chemical is attached to the base 116, and the plunger 121 provided on the syringe 120 is pressed to feed the liquid chemical into the tube 104.
  • the plunger 121 is pushed into the hollow needle 106 until the chemical comes out, and the inside of the tube 104 is filled with the chemical.
  • the chemical solution sent from the syringe 120 is filled from the base member 111 to the distal end opening 110 of the hollow needle 106 via the tube 104, the side hole 108 of the hollow needle 106 and the inside of the hollow needle 106.
  • the first watertight member 109 and the second watertight member 115 are provided, the space between the hollow needle 106 and the inner wall of the tube 104 and the space between the inner wall of the base member 111 and the wire 105 are watertight, The chemical does not leak outside from the portion other than the hollow needle tip opening 110.
  • the slider 112 After the required amount of the drug solution has been sent from the syringe 120 to the tube 104, the slider 112 is rotated in the opposite direction to release the screw engagement with the base member 111. As a result, the elastic return force of the spring member 114 acts, and the slider 112 is returned to the hand side. At the same time, the wire 105 connected to the slider 112 is pulled out from the lumen in the tube 104 formed by the second watertight member 115, and the volume in the tube 104 increases. On the other hand, since the volume of the chemical solution in the tube 104 does not change, the air enters the easiest, and the volume of air that has increased in the force of the tip of the tube 104 invades, and as shown in FIG. Is formed.
  • the injection needle for an endoscope of the present invention is inserted into an endoscope channel (not shown), and the distal end force of the endoscope also protrudes from the distal end of the tube 104.
  • the slider 112 is pushed into the base member 111 so that the tip of the hollow needle 106 also projects the tip of the tube 104.
  • the slider 112 is pushed in and screwed into the base 111, and the state in which the tip of the hollow needle 106 projects from the tip opening 104 a of the tube 104 is maintained.
  • the volume of the liquid lumen of the base member 111 and the tube 104 is reduced, and the air existing at the distal end of the tube 104 and forming the air layer K is pushed out from the distal end opening 104a of the tube 104, and the tube 104 The inside is completely filled with the drug solution.
  • the sealing member 113 is separated from the receiving portion 117 to open the orifice 117b, so that the liquid flow path Q between the syringe 120 and the hollow needle tip opening 110 is secured, and the chemical liquid can flow.
  • the hollow needle 106 which also protrudes the tip of the tube 104, is pierced into the diseased part, and the plunger 121 provided in the syringe 120 is pushed in to inject the drug solution from the hollow needle 6 into the diseased part.
  • the slider 112 is pulled, and the hollow needle 106 is stored in the tube 104. This operation is repeated several times if it is necessary to puncture multiple sites or to inject the drug solution.
  • the tube 104 that also derives the hand force of the endoscope is pulled out, and the injection needle for the endoscope is pulled out of the endoscope. If the drug solution is not enough, a new syringe 120 filled with the drug solution may be used.
  • the hollow needle 106 is housed in the tube 104, and the sealing member 113 is provided in the receiving portion 117 of the base member 111. By closing 17b, liquid flow path Q formed between syringe 120 and hollow needle tip opening 110 is blocked.
  • the relative height between the tip opening 104a of the tube 104 and the plunger 121 surface of the syringe 120 is adjusted to the endoscope. Even if it changes during handling such as insertion, the plunger 121 is not pushed back or pulled in without being affected by the atmospheric pressure acting on the tube tip opening 104a.
  • an operation of removing a drug solution, a body fluid, blood, or the like in a body cavity is performed as needed.
  • a drug solution, a body fluid, blood, or the like may remain in the endoscope channel.
  • the air layer K does not exist at the distal end of the tube as in a general injection needle, when the liquid medicine, body fluid, blood, etc. remaining in the endoscope channel and the liquid medicine filled in the tube are not used. May come into contact with each other, and there is a risk that both are easily mixed because they are liquids.
  • the air layer K exists at the tip of the tube 104 with the operation of drawing the hollow needle 106 into the tube 104. Therefore, even if the tip of the endoscope injection needle of the present invention may come into contact with other chemicals, body fluids, blood, or the like remaining in the endoscope channel, these are filled in the tube 104.
  • the separated chemical solution is separated by the air layer K at the tip of the tube 104, so that both are not mixed!
  • the spring member 114 is interposed between the slider 112 and the base member 11, an external force is applied to the tube 104 when the endoscope injection needle is inserted into the endoscope channel. Also, the state in which the sealing member 113 is securely pressed against the receiving portion 117 can be maintained, and the invasion of air and the like can be reliably prevented.
  • a blocking means may be provided between the hand delivery means and the distal end outlet.
  • the treatment instrument for an endoscope is preferably an injection needle for an endoscope.
  • an endoscope injection needle for delivering a liquid into a body cavity includes a flexible mantle tube and a middle tube. It is desirable to have an empty needle and the hollow needle can be protruded and retracted with respect to the mantle tube.
  • the liquid flow is blocked by the blocking means between the hand-out means and the distal end outlet only when the hollow needle is housed in the outer tube.
  • the blocking means is performed by an operation of pulling the hollow needle into the outer jacket.
  • the endoscope injection needle as described above has an elastic member attached to a wire for driving the needle brought into close contact with a part of the liquid lumen by an operation of pulling the hollow needle into the outer jacket, so that the hand-off means is provided. It is desirable that the liquid flow be shut off between the discharge port at the tip and the outlet.
  • the above-mentioned injection needle for an endoscope includes an outer jacket, a hollow needle having a side hole, a wire attached to a hand of the hollow needle and driving the hollow needle to be able to protrude and retract with respect to the outer jacket, and a proximal end of the outer jacket.
  • a tip water-tight means consisting of a base member attached and keeping the outer periphery of the hollow needle and the inner surface of the mantle water-tight at the tip side from the side hole of the hollow needle, and a hand-tight means for keeping the inner surface of the base member and the wire water-tight. It is desirable to increase the volume of the space on the inner surface of the mantle by pulling the wire toward the watertight means at hand.
  • the operation of pulling the wire forward is the operation of pulling the hollow needle into the outer jacket.
  • the blocking means is fixed to the orifice provided in the flexible sheath or the operation portion main body and the operation wire, and is provided at a distal end side of the orifice. It is desirable that the sealing member can be fitted to the orifice arranged.
  • the present invention provides an outer tube having a liquid passage formed therein; a hollow needle which is housed so as to be able to protrude and retract from the tip of the outer tube and discharges the liquid supplied through the liquid passage; Operating at the base end of the mantle to protrude and retract the hollow needle from the distal end of the mantle tube Means for an endoscope, comprising: a reduced diameter portion formed at a tip of the outer tube, wherein the hollow needle protrudes from the distal end of the outer tube. And a large-diameter portion which is in contact with the reduced-diameter portion to close the distal end of the mantle tube.
  • medical solution the operation
  • the operation of pushing out the tip force of the probe can be easily performed. Further, since an expensive bonding technique is not required as in the related art, the manufacturing cost can be reduced.
  • the present invention provides a mantle tube having a liquid flow passage therein; a tip discharge portion which is housed at the tip of the mantle tube so as to be able to protrude and retract and is connected to the tip of the liquid flow passage; and a hand portion of the mantle tube.
  • Operating means provided for operating the protruding end of the mantle tube from the front end of the mantle tube; communicating with the liquid flow passage provided on the mantle tube and supplying the liquid to the front end discharge portion via the liquid flow passage
  • a treatment device for an endoscope comprising: a liquid supply means for performing the operation; and a blocking means provided in the liquid flow passage and capable of freely opening and closing the flow of the liquid in accordance with the operation of the operation means.
  • the invasion of air with the force of the needle of the tube and the leakage of liquid from the outer tube are prevented, and the work of removing the intruded air becomes unnecessary. Ease increases. Further, since the liquid is not wasted due to the liquid leakage, the economical burden can be reduced. Moreover, the leaked chemical does not stain the white coat and floor.

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Abstract

L'invention concerne une aiguille à injection endoscopique qui a un fil destiné à entraîner une aiguille creuse, logée dans un tube ayant un trou latéral, qui peut apparaître et disparaître au niveau de la tête du tube; un élément embouchure d'alimentation en liquide, fixé à l'extrémité inférieure du tube, à partir de la pointe de l'aiguille creuse et à travers le tube; un premier élément étanche installé plus près du côté de la pointe de l'aiguille creuse que du trou latéral et maintenant une relation d'étanchéité entre une surface périphérique externe de l'aiguille creuse et une paroi interne du tube de revêtement. L'aiguille à injection endoscopique comprend également un moyen de protection doté d'un élément d'étanchéité placé au milieu du fil et ayant un orifice à partir duquel, lorsque l'aiguille creuse doit apparaître et disparaître de la tête du tube de revêtement de ladite aiguille creuse, l'élément d'étanchéité est introduit et enlevé de manière à protéger pendant l'ouverture l'écoulement du liquide entre l'élément embouchure et l'aiguille creuse.
PCT/JP2004/017693 2003-11-28 2004-11-29 Dispositif de traitement endoscopique et aiguille a injection endoscopique WO2005051464A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04819470A EP1695726B1 (fr) 2003-11-28 2004-11-29 Instrument pour un endoscope
DE602004030944T DE602004030944D1 (de) 2003-11-28 2004-11-29 Instrument für ein Endoskop
US11/440,616 US8974417B2 (en) 2003-11-28 2006-05-25 Instrument for an endoscope and needle for an endoscope

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2003-398834 2003-11-28
JP2003398834A JP4409263B2 (ja) 2003-11-28 2003-11-28 内視鏡用注射針
JP2004043215A JP4343730B2 (ja) 2004-02-19 2004-02-19 内視鏡用処置具
JP2004-043215 2004-02-19

Related Child Applications (1)

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US11/440,616 Continuation US8974417B2 (en) 2003-11-28 2006-05-25 Instrument for an endoscope and needle for an endoscope

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Publication Number Publication Date
WO2005051464A1 true WO2005051464A1 (fr) 2005-06-09

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PCT/JP2004/017693 WO2005051464A1 (fr) 2003-11-28 2004-11-29 Dispositif de traitement endoscopique et aiguille a injection endoscopique

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US (1) US8974417B2 (fr)
EP (1) EP1695726B1 (fr)
DE (1) DE602004030944D1 (fr)
WO (1) WO2005051464A1 (fr)

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CN106031655A (zh) * 2014-10-21 2016-10-19 韩国地质资源研究院 具备注射功能的内窥镜

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CN102238917B (zh) * 2008-12-24 2017-05-24 奥林巴斯株式会社 处理器具
US8663190B2 (en) 2011-04-22 2014-03-04 Ablative Solutions, Inc. Expandable catheter system for peri-ostial injection and muscle and nerve fiber ablation
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EP1695726A1 (fr) 2006-08-30
US20060282048A1 (en) 2006-12-14
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US8974417B2 (en) 2015-03-10
EP1695726B1 (fr) 2011-01-05

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